Tube-mill feed.



PATBNTED AUG. 21, 1906.

J. GALWELL.

T333 MILL FEED. APPLICATION FILED snr'r. 16. 1904 2 SHEETS-SHEET 1.

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PATBNI'ED AUG, 21; 1906' J. CALWELL.

TUBE MILL FEED.

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JOHN CALWELL, OF CHICAGO, ILLINOIS.

TUBE-MILL FEED.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application filed September 16, 1904. Serial No. 224,757.

To all whom it may concern.-

Be it known that 1, JOHN CALWELL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Im rovementsinTube-Mill Feeds, of whichthe ollow ing is a specification.

M invention relates to tube-mill feeds, and has or its object to provide a feed supplied with. a spiral conveyer adapted to receive rotaiX motion from the mill-body itself.

further object of my invention is to provide a feed readily and easily attachable to tube-mills of the usual construction and provided with rings at the point of connection with the tube-mill to prevent the escape of material from the feed outwardly through the joint.

With these and other objects in view the present invention consists in the com.bina tion and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly ointed out in the appended claim, it being understood that changes in the form, proortion, size, and minor details maybe made within the scope of the claim, without departing from the spirit of my invention.

In the drawings, Figure 1 is a vertical longitudinal sectional view of my improved tube-mill feed in connection with a tube-mill of the usual construction. Fig. 2 is a vertical sectional view taken on line 2 2 of Fig. 1 and transversely of the machine. Fig. 3 is a front view of one of the rings comprising the joint between the feed and the tube-mill pro er. Fig. 4 is a transverse sectional view on me 4 4 of Fig. 3. Fig. 5 is a view in front elevation of the other ring comprising the joint. Fig. 6 is a transverse sectional view of the ring, taken on line (3 6 of Fig. 5. Fig. 7 is a detailed end view of the spider which embraces the central shaft of the spiral con veyer. I

Like characters of reference designate corresponding parts throughout the several views.

In its referred embodiment my improved tube-millfeed is ada ted to be attached to a tube-mill 1 of the or inary construction, ro vided with a reduced neck extension 2, w rich bears and rotates in the journal 3, which in turn is secured to a stationary base or pier 4.

My improved feed comprises a cylindrical casin 5, rigidly secured to and resting upon a sa dle 6, which is slidable upon a baseplate 7 in a direction longitudinal of the cyindrical casing 5. The cylindrical casing 5 is provided with a late 8, entirely closing one end of the cylindrical casing. A chute 9 is secured upon the casing 5 and at its lower end communicates with an opening 10 in the casing. A slide 11 is disposed to pass through the wall of the chute 9 and to cover the o ening 10 and is provided with a screw 12, a apted to operate the said slide.

At its end opposite the plate 8 the cylindrical casing 5 is provided with an outturned flange 13, adapted to engage a ring 14. The ring 14 is provided with an annular groove 15, adapted to engage and seat an annular projection 16 upon a ring 17, adapted to bear against and en age the end of neck-section 2 of the tube-mil A spider 18 is secured diametrically within the outer end of the necksection 2 and secured therein in grooves formed in said neck-section, as shown in Fig. 7. The spider 18 is provided with an opening 19, coaxial with the neck-section 2, and the said opening 19 is provided with keyways 20. The opening 19 is adapted to receive the central shaft 21 of the spiral conveyor 22. A bearing-seat is formed centrally of end plate 8, adapted to serve as a journal-bearing for the shaft 21. at the end opposite the spider 18. A bracket 23 is secured to the base 7 and is provided at its uppermost end with a screwthreaded opening, within which is disposed a screw 24, adapted to bear against and exert pressure upon the end plate 8. A ring 25 is disposed within the rings 14 and 17 and adapted to cover the point of union of said rings.

The operation of my improved tube-mill feed is as follows: Material is admitted through chute 9 and opening 10 into casing 5. A quantity of material admitted is regulated by the slide 11, operated by the screw 12. The tube-mill 1 and the neck extension 2 being rotated in any well-known manner, the spider l8, rigidly secured therein, is also rotated. The spiral convever 22 bein secured to the spider 18 by the shaft 21 dikewise rotates within the casing 5. The ring 17, engaging the neck extension 2, rotates therewith, and the annular projection 16 rotates within the annular groove 15 of the ring 1 1, which is rigidly secured to the casing 5. Ring 25 being disposed at the point of union of the rings 14 and 17 prevents the passage of material into such joint, and the said him may be lubricated by means of the oil-cup shown. The ring 14 is held in contact with the ring 17 by means of the screw 24 hearing against the end plate 8 and forcing the casing 5 and the entire device bodily toward and against the ring 17. It will thus be seen that the rotation of the mill-body itself is communicated to and produces a rotary movement of the s iral conveyor 22, which draws the material. rom the casing 5 and forces it into the mill 1 in the usual well-known manner of spiral conveyers.

While I have shown in detail all the desirable features for a perfect and satisfactory working of my improved tube-mill feed, it is obvious that the principal and necessary features of said mill are the spiral'conveyer and the casing in which the said spiral conveyer rotates.

It is further obvious that the method of connecting and the construction of the devices for connecting as shown may be consider ably varied and that numerous minor changes may be made in the structure of my device without departing from the spirit of my invention or the scope of the claim.

Having thus described my invention, what I claim as novel, and desire to secure by Letters Patent, is

A device of the character described, comprising a rotatable mill-casing provided with a contracted neck-section coaxial therewith, a non-rotative cylindrical casing disposed in axial alinement with the mill-body and adjacent to the open end of the neck-section, two collars provided with annular tongue and groove dlsposed to form a joint between the neck-section and said casing, a ring disposed to cover the internal point of contact of the two collars with each other, a spiral conveyor disposed longitudinally and mounted to rotate within the cylindrical casing and means for connecting the spiral conveyer with the rotating neck-section adapted to impart a rotary motion to the conveyer.

In testimony whereof I affix my slgnature in presence of two Witnesses.

JOHN CALWELL.

Witnesses:

E. D. ANDRUS, F. O. ROBINSON. 

